Design of high efficiency wireless charging pad based on magnetic resonance coupling

Jinsung Choi; Young Ho Ryu; Dongzo Kim; Nam Yoon Kim; Changwook Yoon; Yun Kwon Park; Sangwook Kwon; Youngoo Yang

doi:10.23919/eumc.2012.6459215

Design of high efficiency wireless charging pad based on magnetic resonance coupling

Jinsung Choi
, Young Ho Ryu
, Dongzo Kim
, Nam Yoon Kim
, Changwook Yoon
, Yun Kwon Park
, Sangwook Kwon
, Youngoo Yang

RFMD Inc.
Samsung
Sungkyunkwan University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

5 Scopus citations

Abstract

In this paper, a design of wireless power charging pad based on magnetic resonance coupling is introduced. For highly efficient operation of the overall charging pad system, the efficiency of RF TX is very important so that the 6.78MHz, 30W, 91% class-E power amplifier (PA) is designed and the power tracking technique, whose function is easily embedded in the AC-to-DC power converter conventionally used for consumer electronics, is applied for the power control. Compared to the conventional approach employing the additional DC-to-DC converter for the power control, it presents maximally 20% higher efficiency over the wide output power region. To charge various mobile devices on a single 320×220mm² TX pad, a uniform field resonator is designed. The receiving unit consists of a general full-bridge rectifier and a 5V DC-DC converter coupled to the internal battery charger in the mobile device. The overall AC60Hz-to-DCLoad efficiency of the implemented wireless power charging pad is 42-51% for various charging conditions; from single device to multiple devices of Samsung Galaxy-S2, Galaxy-Tab7, and NX-100 Digital Camera. The DC-to-DC efficiencies, generally used term to present the system efficiency, are higher than 60% for the whole cases.

Original language	English
Title of host publication	European Microwave Week 2012
Subtitle of host publication	"Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012
Publisher	IEEE Computer Society
Pages	916-919
Number of pages	4
ISBN (Print)	9782874870279
DOIs	https://doi.org/10.23919/eumc.2012.6459215
State	Published - 2012
Externally published	Yes
Event	2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012 - Amsterdam, Netherlands Duration: 29 Oct 2012 → 1 Nov 2012

Publication series

Name	European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012

Conference

Conference	2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012
Country/Territory	Netherlands
City	Amsterdam
Period	29/10/12 → 1/11/12

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

charging pad
multiple charging
power control
resonance
RF power amplifier
Wireless power transmission

Access to Document

10.23919/eumc.2012.6459215

Cite this

Choi, J., Ryu, Y. H., Kim, D., Kim, N. Y., Yoon, C., Park, Y. K., Kwon, S., & Yang, Y. (2012). Design of high efficiency wireless charging pad based on magnetic resonance coupling. In European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012 (pp. 916-919). Article 6459215 (European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012). IEEE Computer Society. https://doi.org/10.23919/eumc.2012.6459215

Choi, Jinsung ; Ryu, Young Ho ; Kim, Dongzo et al. / Design of high efficiency wireless charging pad based on magnetic resonance coupling. European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012. IEEE Computer Society, 2012. pp. 916-919 (European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012).

@inproceedings{85c30a1d0bb44fa9af3ab78171eaf007,

title = "Design of high efficiency wireless charging pad based on magnetic resonance coupling",

abstract = "In this paper, a design of wireless power charging pad based on magnetic resonance coupling is introduced. For highly efficient operation of the overall charging pad system, the efficiency of RF TX is very important so that the 6.78MHz, 30W, 91\% class-E power amplifier (PA) is designed and the power tracking technique, whose function is easily embedded in the AC-to-DC power converter conventionally used for consumer electronics, is applied for the power control. Compared to the conventional approach employing the additional DC-to-DC converter for the power control, it presents maximally 20\% higher efficiency over the wide output power region. To charge various mobile devices on a single 320×220mm2 TX pad, a uniform field resonator is designed. The receiving unit consists of a general full-bridge rectifier and a 5V DC-DC converter coupled to the internal battery charger in the mobile device. The overall AC60Hz-to-DCLoad efficiency of the implemented wireless power charging pad is 42-51\% for various charging conditions; from single device to multiple devices of Samsung Galaxy-S2, Galaxy-Tab7, and NX-100 Digital Camera. The DC-to-DC efficiencies, generally used term to present the system efficiency, are higher than 60\% for the whole cases.",

keywords = "charging pad, multiple charging, power control, resonance, RF power amplifier, Wireless power transmission",

author = "Jinsung Choi and Ryu, \{Young Ho\} and Dongzo Kim and Kim, \{Nam Yoon\} and Changwook Yoon and Park, \{Yun Kwon\} and Sangwook Kwon and Youngoo Yang",

year = "2012",

doi = "10.23919/eumc.2012.6459215",

language = "English",

isbn = "9782874870279",

series = "European Microwave Week 2012: {"}Space for Microwaves{"}, EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012",

publisher = "IEEE Computer Society",

pages = "916--919",

booktitle = "European Microwave Week 2012",

note = "2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012 ; Conference date: 29-10-2012 Through 01-11-2012",

}

Choi, J, Ryu, YH, Kim, D, Kim, NY, Yoon, C, Park, YK, Kwon, S & Yang, Y 2012, Design of high efficiency wireless charging pad based on magnetic resonance coupling. in European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012., 6459215, European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012, IEEE Computer Society, pp. 916-919, 2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012, Amsterdam, Netherlands, 29/10/12. https://doi.org/10.23919/eumc.2012.6459215

Design of high efficiency wireless charging pad based on magnetic resonance coupling. / Choi, Jinsung; Ryu, Young Ho; Kim, Dongzo et al.
European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012. IEEE Computer Society, 2012. p. 916-919 6459215 (European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Design of high efficiency wireless charging pad based on magnetic resonance coupling

AU - Choi, Jinsung

AU - Ryu, Young Ho

AU - Kim, Dongzo

AU - Kim, Nam Yoon

AU - Yoon, Changwook

AU - Park, Yun Kwon

AU - Kwon, Sangwook

AU - Yang, Youngoo

PY - 2012

Y1 - 2012

N2 - In this paper, a design of wireless power charging pad based on magnetic resonance coupling is introduced. For highly efficient operation of the overall charging pad system, the efficiency of RF TX is very important so that the 6.78MHz, 30W, 91% class-E power amplifier (PA) is designed and the power tracking technique, whose function is easily embedded in the AC-to-DC power converter conventionally used for consumer electronics, is applied for the power control. Compared to the conventional approach employing the additional DC-to-DC converter for the power control, it presents maximally 20% higher efficiency over the wide output power region. To charge various mobile devices on a single 320×220mm2 TX pad, a uniform field resonator is designed. The receiving unit consists of a general full-bridge rectifier and a 5V DC-DC converter coupled to the internal battery charger in the mobile device. The overall AC60Hz-to-DCLoad efficiency of the implemented wireless power charging pad is 42-51% for various charging conditions; from single device to multiple devices of Samsung Galaxy-S2, Galaxy-Tab7, and NX-100 Digital Camera. The DC-to-DC efficiencies, generally used term to present the system efficiency, are higher than 60% for the whole cases.

AB - In this paper, a design of wireless power charging pad based on magnetic resonance coupling is introduced. For highly efficient operation of the overall charging pad system, the efficiency of RF TX is very important so that the 6.78MHz, 30W, 91% class-E power amplifier (PA) is designed and the power tracking technique, whose function is easily embedded in the AC-to-DC power converter conventionally used for consumer electronics, is applied for the power control. Compared to the conventional approach employing the additional DC-to-DC converter for the power control, it presents maximally 20% higher efficiency over the wide output power region. To charge various mobile devices on a single 320×220mm2 TX pad, a uniform field resonator is designed. The receiving unit consists of a general full-bridge rectifier and a 5V DC-DC converter coupled to the internal battery charger in the mobile device. The overall AC60Hz-to-DCLoad efficiency of the implemented wireless power charging pad is 42-51% for various charging conditions; from single device to multiple devices of Samsung Galaxy-S2, Galaxy-Tab7, and NX-100 Digital Camera. The DC-to-DC efficiencies, generally used term to present the system efficiency, are higher than 60% for the whole cases.

KW - charging pad

KW - multiple charging

KW - power control

KW - resonance

KW - RF power amplifier

KW - Wireless power transmission

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U2 - 10.23919/eumc.2012.6459215

DO - 10.23919/eumc.2012.6459215

M3 - Conference contribution

AN - SCOPUS:84874622716

SN - 9782874870279

T3 - European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012

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EP - 919

BT - European Microwave Week 2012

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Y2 - 29 October 2012 through 1 November 2012

ER -

Choi J, Ryu YH, Kim D, Kim NY, Yoon C, Park YK et al. Design of high efficiency wireless charging pad based on magnetic resonance coupling. In European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012. IEEE Computer Society. 2012. p. 916-919. 6459215. (European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012). doi: 10.23919/eumc.2012.6459215

Design of high efficiency wireless charging pad based on magnetic resonance coupling

Abstract

Publication series

Conference

UN SDGs

Keywords

Access to Document

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